How often must segmentation controls be penetration tested?

Segmentation controls must be penetration tested at least annually to ensure their effectiveness in isolating sensitive environments, especially those that handle payment card information. The PCI DSS standards require organizations to validate their security measures on a regular basis to ensure they are functioning properly and can withstand potential threats. Annual penetration testing allows organizations to identify vulnerabilities and weaknesses in their segmentation controls and to address any issues promptly.

This frequent reassessment is crucial because threats and attack techniques evolve over time, making it essential for organizations to keep their defenses up-to-date. Additionally, annual testing aligns with the PCI DSS's overarching goal of maintaining a high level of security for cardholder data and preventing unauthorized access to sensitive environments. By enforcing this requirement, the PCI DSS helps organizations protect both their data and their customers effectively.